HYDRAULIC SYSTEM (CONTINUED)
SYMPTOM
PROBLEM: REMEDY
SYSTEM OPERATES TOO FAST
Wrong size or incorrectly adjusted restrictor:
replace or
adjust as necessary.
Engine running too fast:
reduce engine speed.
OVER HEATING OF
OIL IN SYSTEM
Oil passing through relief valve for excessive time:
return con-
trol valve to neutral when not in use.
Incorrect, low, dirty oil:
use recommended oil. Fill reservoir
with clean oil. Replace filter.
Engine running too fast:
reduce engine speed.
Excessive component internal leakage:
repair or replace
component as necessary.
Restriction in filters or lines:
clean and/or replace filter or lines.
Insufficient heat radiation:
clean dirt and mud from
reservoir and components.
Malfunctioning component:
repair or replace.
Excess oil going to dock level circuit:
adjust flow divider for 2.5
to 3.1 GPM flow.
FOAMING OF OIL
Incorrect, low, or dirty oil:
replace, clean or add oil as needed.
Water in oil:
replace oil
Air leaks:
check suction line and component seals for suction
leaks. Replace defective parts.
NOISY PUMP
Low, incorrect, foamy oil:
replace, clean, or add oil as needed.
Suction line plugged:
clean out obstruction or replace line.
Flush system, replace filter.
Pump damaged:
repair or place.
LEAKY PUMP
Damaged or worn shaft seal:
Replace seal and/or shaft and
check for misalignment.
Loose or broken parts:
Tighten or replace.
CYLINDERS MOVE WITH
CONTROL VALVE IN
NEUTRAL POSITION
Leaking cylinder seals or fittings:
Replace worn seals or fittings.
Control valve not centering when released:
Check linkage for
binding and repair.
Valve damaged:
Repair or replace.
CONTROL VALVE LEAKS
Seals damaged or worn:
Replace.
CYLINDER LEAKS
Seals worn or damaged:
Replace.
Rod damaged:
Replace.
Barrel damaged:
Replace.
CYLINDERS DO NOT
FUNCTION, OR CREEP
WITH PTO DISENGAGED
Leaking fittings or cylinder seals:
Tighten loose fittings.
Replace worn seals or fittings.
Piloted check valve or O-ring leak:
Replace defective component.
5-8
Summary of Contents for 825A
Page 8: ......
Page 12: ......
Page 14: ...3 2 Figure 3 1 Model 825 Trailer Terminology Figure 3 2 Service Hookups...
Page 18: ...3 6 Figure 3 3 Hydraulic Controls...
Page 22: ...3 10 Figure 3 5 Swingout Outrigger Platform Extension...
Page 24: ...3 12 Figure 3 6 Gooseneck Attachment to Frame...
Page 34: ......
Page 36: ...4 2 Figure 4 1 Lubrication Points...
Page 40: ...4 6 Figure 4 2 Model 825A Wiring Diagram...
Page 43: ...4 9 Figure 4 4 Tandem Axle Air Ride Suspension System...
Page 44: ...4 10 Figure 4 5 Tandem Axle W Flip Air Ride Suspension System...
Page 47: ...4 13 Figure 4 8 Checking Axle Alignment Figure 4 9 Examples of Camber...
Page 52: ...4 18 Figure 4 12 Axle and Brake Assembly...
Page 59: ...4 25 Figure 4 18 Mounting Tires and Wheels Figure 4 19 Stud Tightening Sequence...
Page 69: ...NOTES 5 9...
Page 70: ......
